/Engine/Source/Runtime/Engine/Classes/Kismet/KismetMathLibrary.h
Linearly interpolates between A and B based on Alpha (100% of A when Alpha=0 and 100% of B when Alpha=1).
static FTransform TLerp ( const FTransform & A, const FTransform & B, float Alpha, [TEnumAsByte](API\Runtime\Core\Containers\TEnumAsByte)< [ELerpInterpolationMode::Type](API\Runtime\Engine\Kismet\ELerpInterpolationMode__Type) > InterpMode )